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## org.apache.cocoon.forms.event
Interface ValueChangedListenerEnabled

All Known Implementing Classes:
  BooleanField, Field, MultiValueField, Output, Upload

public interface ValueChangedListenerEnabled

Interface to be implemented by Widgets on which ValueChangedListeners can be registered.

Method Summary
`void` | `addValueChangedListener(ValueChangedListener listener)`
`boolean` | `hasValueChangedListeners()`
`void` | `removeValueChangedListener(ValueChangedListener listener)`

Method Detail

### addValueChangedListener

    public void addValueChangedListener(ValueChangedListener listener)

### removeValueChangedListener

    public void removeValueChangedListener(ValueChangedListener listener)

### hasValueChangedListeners

    public boolean hasValueChangedListeners()

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